Base assembly



FIG. 1 is a front perspective view of the base assembly showing my new design;

FIG. 2 is a back elevational view thereof;

FIG. 3 is a right side elevational view of the base assembly;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view of the base assembly;

FIG. 6 is a top elevation view of the base assembly; and,

FIG. 7 is a bottom elevational view thereof. 

The ornamental design for a base assembly, as shown and described. 